Rails, How to deliver dynamic email depending on user status after session expiration

So I have a website similar to an e-commerce site. I want to send out an email to the user after session expiry(preferably 30min after expiry), with dynamic content - with respect to their status, i.e. if they have items in their cart, if they haven't paid, or if the payment was successful.

So there are three questions here?

• What are different ways to achieve this?
• Is it possible to run a section of code after 30min of session expiration?
• Is it possible to put an if-else statement to the mail delivery depending on the user status?

Currently, I'm using Rails 5.0.0, and sendgrid to send emails. Sendgrid has codes like Mail.deliver_after(30 mins). But I can't seem to put an if else condition to make the content of the email dynamic. Also, I want to send the email after 30 mins after session expiry.

What are different ways to achieve this?

- Using background job. Create asynchronous jobs with run time and priority.

Is it possible to run a section of code after 30min of session expiration?

- Use delayed_job gem or use some other background job gems. Using asynchronously

Is it possible to put an if-else statement to the mail delivery depending on the user status?

 - Called mail delivery using background job so you can send mail whenever you want.